TIME-DOMAIN INDUCED POLARIZATION LOGGING METHOD AND APPARATUS

摘要

THE STIMULUS SIGNAL FOR AN INDUCED POLARIZATION LOGGING SYSTEM IS PRESENTED TO THE FORMATION INTERMITTENTLY, ALTERNATELY BEING APPLIED AND REMOVED AS A SQUARE WAVE OF ALTERNATING POLARITY, AND THE RESPONSE SIGNAL AMPLIFICATION LEVEL IS TIME GATED WITH THE STIMULUS SIGNAL.(FIG 1)